of the cliff for climate change f. global average temperatures warm more than that we will up the odds of new and worsening climate capacity. stay below that mark and we may be able to avoid some of the worst aspects of global warming. when we burn gas in our cars or coal we add carbon to the at moss fear and warm the planet. scientists say the effort's temperature has warmed 0.85 degrees celsius since 1880. if we want to slow it we will have to cut back and fast. if we don't the world could hit two degrees celsius in a few decades. this simple number raises a bunch of complex questions, what happens if we cross that threshold or get close? how can we prevent that from happening? many experts say it is possible for us to stop short of two degrees. to stay back from the cliff buff